Word Study
terrain
OXFORD DICTIONARY
terrain, n. a tract of land as regarded by the physical geographer or the military tactician.
Etymology
F, ult. f. L terrenum neut. of terrenus TERRENE
THESAURUS
terrain
Lebensraum, acres, agora, air space, airspace, alluvion, alluvium, amphitheater, arable land, area, arena, athletic field, auditorium, back country, background, bailiwick, bear garden, belt, bowl, boxing ring, bull ring, campus, canvas, champaign, circus, clay, clear space, clearance, clearing, clod, cockpit, coliseum, colosseum, confines, continental shelf, contour, corridor, country, course, crust, demesne, department, desert, dirt, distant prospect, district, division, domain, dominion, dry land, dust, earth, empty view, environs, field, floor, form, forum, freehold, glade, glebe, grassland, ground, gym, gymnasium, hall, heartland, hinterland, hippodrome, land, landholdings, landscape, lists, lithosphere, living space, locale, marginal land, marketplace, marl, mat, milieu, mold, neighborhood, offshore rights, open country, open forum, open space, outback, palaestra, parade ground, part, parts, pit, place, plain, platform, prairie, precinct, precincts, premises, prize ring, profile, province, public square, purlieu, purlieus, quarter, range, real estate, real property, region, regolith, ring, salient, scene, scene of action, scenery, section, setting, shape, site, sod, soil, space, sphere, squared circle, stadium, stage, stage set, stage setting, steppe, subaerial deposit, subsoil, terra, terra firma, territory, the country, theater, three-mile limit, tilting ground, tiltyard, topography, topsoil, turf, twelve-mile limit, vicinage, vicinity, walk, wide-open spaces, wilderness, woodland, wrestling ring, zoneFor further exploring for "terrain" in Webster Dictionary Online